Molded pail from fibrous pulp



(No Model.) v w r E. HUBBARD. 'MOLDEDPAIL FROM FIBROUS PULR No. 487,031.Patented Nov. 29, 1892 fieye'zz'tan "m: NOR

UNITED STATES PATENT ()FFICE.

EBER. HUBBARD, OF CHICAGO, ILLINOIS.

MOLDED PAIL FROM FIBROUS PULP.

SPECIFICATION formingpart of Letters Patent No. 487,031, dated November29, 1892. Application filed May 23, 1892. Serial No. 434,040- (Nomodel.)

T0 at whom it may concern:

Be it known that I, EBER. HUBBARD, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois,have inventedcertain new and useful Improvements in Molded Pails from Fibrous Pulp,which are fully set forth in the following specification, referencebeing had to the accompanying drawings, forming a part thereof.

This invention consists of a pail or similar vessel which is made fromfibrous pulp and molded into form, the constructionbein g such as torequire a very simple apparatus and resulting in a pail substantiallyintegral and without joints at which there may be liability to leakage.

In the drawings, Figure 1 is a vertical section through my improvedpail. Fig. 2 is a top plan. Fig. 3 is an 'elevation of a molded blank ofpulp from which the body of the pail is formed.

The body A of the pail is molded in a sector-shaped mold, the radii ofwhose arcs correspond to the taper of the pail, so that thesector-shaped blank produced in the mold and represented in Fig. 3 beingwrapped about the tapering form corresponding to the interior shape ofthe pail will produce the cone frustum,needing only thebottom to make acomplete pail. This blank for the body is molded with its opposite edgesbeveled, as

seen at A A in Fi s. 2 and 3, so that when rolled up into the shape ofthe finished pail the beveled edges will lap, as seen in Fig. 2, makinga long lap-joint. The lower margin of the blank is also beveled at A onthe outer side to afford opportunity for a similar long lap-jointbetween the body and bottom. The bottom 13 is molded in the form shownin cross-section in Fig. 1 with the downwardlyprojecting marginal flangeB constituting the chine of the pail, and the upwardly-projectingmarginal flange B whose outer surface corresponds to the taper of thepail and whose inner surface makes an acute angle with the outer at theupper edge, the slope of said inner surface corresponding to the bevelof the lower edge of the body A, so that the body may be inserted withinthe said upper flange B of the bottom and its beveled edge make contactthroughout with the inner sloping surface of the flange, as seen inFig. 1. When the two parts of the pail thus formed and assembled whi ein the condition of plastic pulp are subjected to pressure to thoroughlyexpel the moisture and compact the fiber, the pulp will cohere at boththe junctions shownto wit, the lap-joint A A of the body and thelap-joint between the marginal flange B of the bottom and the beveledlower margin of the bodyas perfectly as at any other part of the pail,and the structure will thereby become substantially integral and whenindnrated according to any of the known methods will have the characterof a seamless jointless vessel, as if it were all molded in one processand in one mold; but it will have a smoothness of finish and uniformityof density which it is impossible to attain except by expensiveprocesses of machinery and great care and by primarily injecting thepulp into a mold of the form of the completed pail.

I claim 1. A vessel of fibrous pulp, having a body molded and lapped endupon end, forming a lap-joint from top to bottom, and the bottom moldedand lapped onto the body throughout the entire periphery, said body andbottom being rendered integral at such lap-joints, substantially as setforth.

2. The process of making vessels from mold- I ed pulp, which consists inmolding a sectoral body with the ends and the shorter side beveled andmolding a bottom with an upstanding peripheral flange beveled tocorrespond with the beveled or side edge of the body, curving the bodyand lapping its beveled ends one upon the other, and applying thebeveled side edge of the body to the beveled upstanding edge flange ofthe bottom and compressing the vessel thus assembled to integrality atthe lap-joints formed by the bevels, respectively, substantially as setforth.

In testimony whereof I have hereunto set myhand, in the presence of twowitnesses, at Chicago, Illinois, this 10th day of May, 1892.

EBER. HUBBARD.

